Helmer Scientific i.Series
®
and Horizon Series
™
Freezer - Undercounter
Service and Maintenance Manual
360417/A
55
10.3 Settings
Temperature Setpoint
The default setpoint for the freezer is -30.0 °C. This can be changed if your organization requires a chamber temperature
other than the default setting.
Change Setpoint:
Note
The current temperature setpoint is typically higher than the chamber temperature.
1. Press and release
MODE
to change to Control mode. The CONTROL lamp will illuminate.
2. Press and hold
SET
to display the current temperature setpoint.
3. Hold
SET
and press the
Up
or
Down Arrow
as necessary to set the desired setpoint value.
4. Release the
SET
button. The setpoint is changed.
5. Press and release
MODE
to return to Monitor mode. The MONITOR lamp will illuminate.
Temperature Settings
Temperature settings are factory pre-set. Settings can be viewed and changed through the Monitor and Control interface.
Table 12. Parameters, Indicators and Settings
Parameter
Visual Indicator
Range
Default
Celsius or Fahrenheit
°C Lamp or °F Lamp
.C, .F
.C
High Temperature
MONITOR Lamp & HIGH Lamp
-40.0 to 25.0 (°C); -40 to 77 (°F)
-
20.0 °C
Low Temperature
MONITOR Lamp & LOW Lamp
-40.0 to 25.0 (°C); -40 to 77 (°F)
-40.0 °C
Monitor Offset
MONITOR Lamp only
-10.0 to 10.0 (°C); -18 to 18 (°F)
Varies
Control Offset
CONTROL Lamp only
-10.0 to 10.0 (°C); -18 to 18 (°F)
Varies
Evaporator Defrost Offset
MONITOR lamp & CONTROL lamp
-10.0 to 10.0 (°C); -18 to 18 (°F)
Varies
Upper Rail Limit
CONTROL Lamp and HIGH Lamp
0.1 to 10.0 (°C); 1 to 18 (°F)
0.7 °C
Lower Rail Limit
CONTROL Lamp and LOW Lamp
0.1 to 10.0 (°C); 1 to 18 (°F)
-0.7 °C
View Settings and Offset Values
1. Press and hold the
Up
and
Down Arrows
simultaneously for three seconds to enter program mode.
2. The LED Display will show .C or .F to indicate Celsius or Fahrenheit.
3. Press and release
MODE
to scroll through the parameters and view settings.
4. Hold the
Up
and
Down Arrows
simultaneously for three seconds to exit program mode.
5. The LED Display will show the current monitor temperature.
Temperature Units
Note
If temperature units are changed, the temperature setpoints, offsets and alarm settings must be recalibrated.
Select Temperature Units
1. Press and hold the
Up
and
Down Arrows
simultaneously for three seconds to enter program mode.
2. The LED Display will show .C or .F to indicate Celsius or Fahrenheit.
3. Press and hold the
SET
button while pressing the
Up
or
Down Arrow
to select the desired temperature unit parameter.
4. Release the
SET
button. The new setting is saved.
5. Press and hold the
Up
and
Down Arrows
simultaneously for three seconds to exit program mode.
Horizon Series
